Nodeless bulk superconductivity in the time-reversal symmetry breaking Bi/Ni bilayer system

Prashant Chauhan, Fahad Mahmood, Di Yue +3

Epitaxial bilayer films of Bi(110) and Ni host a time-reversal symmetry (TRS) breaking superconducting order with an unexpectedly high transition temperature $T_c=4.1$ K. Using t…